The Intervention benefits from the use of a highly efficient stainless steel muzzle brake - the McArthur PGRS-1 series - to help contend with the inherently violent recoil of such a weapon. An "efficient" muzzle brake allows repeated firing of the gun without exhausting the operator which, in other systems, generates fatigue and can lead to inaccurate results over the long run. The unique muzzle brake design, by gunsmith Bruce McArthur, forces the resulting gasses away from the eyes of the shooter prior to the bullet actually leaving the muzzle brake itself.
As a "take-down" rifle system, the Intervention can be broken down into smaller major components for storage during transport or during infiltration (via sea or air). CheyTac claims that their rifle system can maintain its "zero" tolerance meaning that, in the event of a complete system takedown, the rifle can be reassembled without loss to its inherent accuracy. Regardless of time of day or position from shooter to target, the Intervention has proven this feat in testing to consistently deliver rounds on target.
CheyTac markets their rifle with two distinct primary optical sighting systems. The standard scope model is the Nightforce NXS 5.5-22x variable telescopic sight. The night vision version is the SIM RAD. Customer-specific optics can also be used. The Intervention can mount other accessories beyond the traditional optics including a suppressor, an infrared (IR) laser illumination system, the KESTREL 4000/4500 data processing system (for accurate reading of wind, air temperature and pressures), the Leica Vector IV laser rangefinder and the SUUNTO X6 environmental computer won on the operator's wrist.
The Intervention has appeared in a handful of variants under differing model numbers per company nomenclature. The M-200 is a standard rifle design with a 29 inch barrel of which a shortened carbine form was also developed, since out of production now. The M-200 CIV is a known civilian market model. All M-200 series rifles operate from the detachable box magazine and feature the aforementioned adjustable wire telescoping shoulder stock. The M-310 series includes the M-310 SS and M-310 R to indicate respective "single-shot" and "repeater" firing actions. Both have a 29 inch barrel. The M-325 series includes the M-325 SS and M-325 R with the same respective firing actions as the M-310 series though these are finished with 28 inch barrels. The 300-series rifles are seen with McMillan fiberglass shoulder stocks.
McMillan fiberglass shoulder stock. The M-310 is further evolved into sub-variants to include the M-310 SS and the M-310 R, the major difference between the two designs being the former's "single-shot" action and the latter's "repeating" action - hence their associated letter designations.
Despite its American origins, the US military does not make use of the Intervention at this time - much to the disappointment of CheyTac. However, special forces of Poland and Turkey have found the system highly favorable for their operatives and actively use the weapon today. Production began in 2001 and is ongoing as of this writing.
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